The mind can be a prison.
No judge seated behind any bench can sentence a man to any harsher punishment than said man can inflict upon himself, within his own mind.
Think about it.
Death by lethal injection is far more humane than we like to believe that it is; it's a similar solution given to put animals to sleep.
No. Someone can torture themselves far better than others can.
For who knows oneself better than oneself?
None.
A day will come where the mind will either free one from the self-imposed restraints and break the chains, or cease to be. Ceasing to be is also similar to being free, except, unless you believe in Sky God who resides upon a cloud somewhere, randomly causing things to happen (something more like a Marvel Comic, isn't it?), once the mind and body cease, there's nothing.
Freedom won't be realized, because the mind will no longer exist.
One might say I've begun breaking the chains.
Scarred and wounded, struggling a bit, wobbly. But upright and with some sort of purpose, moving forward.
Eventually, we'll all cease to be. But had I remained where I was, in a form of captivity, I might have helped myself along a bit sooner to finding the end.
Of course, this extends only partially to this thing called life, but it's a big part.
I'm home now.